LLM tools

llms.txt Checker

Check a domain or paste llms.txt content to validate its structure and review suggestions.

About llms.txt

What llms.txt is, and what a valid one looks like

llms.txt is a proposed format for providing a concise website overview and links in Markdown for language models.

What is llms.txt?

A structured Markdown file at /llms.txtPlain text at your domain root, next to robots.txt and your sitemap.
Provides a content overview for language modelsWho you are and what the site covers, in a few lines.
Links to important Markdown documentationThe pages worth reading, each with a short note on what it is for.
Helps language models understand website contentOne small file to read instead of crawling every page.

llms.txt format requirements

Required: an H1 title with the project nameOne per file, at the top: # Project name
Blockquote summary after the titleRight under the H1: > One-line summary
H2 sections with Markdown linksEach list item is a link: - [Title](https://…): note
Optional: a secondary information sectionTitled ## Optional, for links a model can skip.

Example llms.txt

1# FastAPI
2
3> FastAPI is a modern, fast (high-performance) web framework for building APIs with Python, based on standard Python type hints.
4
5FastAPI ships with automatic OpenAPI docs, dependency injection and async support out of the box.
6
7## Docs
8
9- [Quick start](https://example.com/quickstart.md): A brief overview of the key FastAPI features
10- [SQLAlchemy ORM](https://example.com/sqlalchemy.md): Using the ORM with FastAPI models
11
12## Examples
13
14- [A complete app](https://example.com/walkthrough.md): A detailed walk-through of a one-page application
15
16## Optional
17
18- [Core API reference](https://example.com/core.md): The full, extensive API documentation